Carpenter ants are also known as sugar ants. They are large (0.3 to 1 inch in size). They build nests inside wood consisting of galleries chewed out with their mandibles, preferably in dead, damp wood. They do not consume the wood, unlike termites. Sometimes, carpenter ants hollow out sections of trees. They also commonly infest wooden buildings and structures and are a widespread nuisance and major cause of structural damage.